Rails 4無法啟動服務器或db：migrate

Question

這里是Rails 4的新手，我已經瀏覽了其他問題，但似乎找不到答案，可以隨時向正確的方向指出！

這是我嘗試運行rails服務器的錯誤代碼：

Exiting
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated': Rails::Application::RoutesReloader#execute_if_updated delegated to updater.execute_if_updated, but updater is nil: #<Rails::Application::RoutesReloader:0x007fe70babade8 @paths=["/Users/mac/autostudy/config/routes.rb"], @route_sets=[#<ActionDispatch::Routing::RouteSet:0x007fe70b96aa60>]> (RuntimeError)
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
    from /usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
    from /Users/mac/autostudy/config/environment.rb:5:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
    from /Users/mac/autostudy/config.ru:3:in `block in <main>'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
    from /Users/mac/autostudy/config.ru:in `new'
    from /Users/mac/autostudy/config.ru:in `<main>'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands/server.rb:48:in `app'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands/server.rb:75:in `start'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:78:in `block in <top (required)>'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:73:in `tap'
    from /usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/commands.rb:73:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

這是我嘗試運行rake db：migrate的錯誤代碼：

** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
Rails::Application::RoutesReloader#execute_if_updated delegated to updater.execute_if_updated, but updater is nil: #<Rails::Application::RoutesReloader:0x007f9f29225838 @paths=["/Users/mac/autostudy/config/routes.rb"], @route_sets=[#<ActionDispatch::Routing::RouteSet:0x007f9f2b890ab8>]>
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/Users/mac/autostudy/config/environment.rb:5:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:236:in `call'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:236:in `block in execute'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:231:in `each'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:231:in `execute'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:197:in `block in invoke_prerequisites'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:195:in `each'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:195:in `invoke_prerequisites'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:174:in `block in invoke_with_call_chain'
/usr/local/rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:161:in `invoke'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:149:in `invoke_task'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:106:in `each'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:106:in `block in top_level'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:115:in `run_with_threads'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:100:in `top_level'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:78:in `block in run'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:75:in `run'
/usr/local/rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/bin/rake:33:in `<top (required)>'
/usr/local/rvm/gems/ruby-2.0.0-p247/bin/rake:23:in `load'
/usr/local/rvm/gems/ruby-2.0.0-p247/bin/rake:23:in `<main>'
Tasks: TOP => db:migrate => environment

如果問題已經回答或很明顯，我深表歉意-老實說我找不到它。

提前致謝！

config / routes.rb文件：

  Autostudy::Application.routes.draw do
  resources :posts

  get "admin" => "admin#index" 
  resources :resources

  resources :contents

  resources :courses

  resources :user_profiles


  authenticated :user do
    root "home#index"
  end
  root "home#index"
  resources :users, :only => [:index, :show, :edit, :update ]
  get '/auth/:provider/callback' => 'sessions#create'
  get '/signin' => 'sessions#new', :as => :signin
  get '/signout' => 'sessions#destroy', :as => :signout
  get '/auth/failure' => 'sessions#failure'
end

Answer 1

感謝您的提示。 原來是我的路線文件中的這部分，它不喜歡：

  authenticated :user do
    root "home#index"
  end
  root "home#index"

所以我把它改回了：

    root "home#index"

而且一切正常。 謝謝，我將以其他方式處理經過身份驗證的登錄頁面。